Buggy code:
static final String CERT_ALIAS = JMeterUtils . getProperty ( "proxy.cert.alias" ) ; public static enum KeystoreMode { USER_KEYSTORE , JMETER_KEYSTORE , DYNAMIC_KEYSTORE ; } static final ProxyControl . KeystoreMode KEYSTORE_MODE ; private static final boolean ATTEMPT_REDIRECT_DISABLING = JMeterUtils . getPropDefault ( "proxy.redirect.disabling" , true ) ; private static String LAST_REDIRECT = null ; private transient Daemon server ; private long lastTime = 0 ; private transient KeyStore keyStore ; private volatile boolean addAssertions = false ; private volatile int groupingMode = 0 ; private volatile boolean samplerRedirectAutomatically = false ; private volatile boolean samplerFollowRedirects = false ; private volatile boolean useKeepAlive = false ; private volatile boolean samplerDownloadImages = false ; private volatile boolean regexMatch = false ; private JMeterTreeNode target ; private String storePassword ; private String keyPassword ; public ProxyControl ( ) { } public void setPort ( int port ) { } public void setPort ( String port ) { } public void setSslDomains ( String domains ) { } public String getSslDomains ( ) { } public void setCaptureHttpHeaders ( boolean capture ) { } public void setGroupingMode ( int grouping ) { } public void setAssertions ( boolean b ) { } @ Deprecated public void setSamplerTypeName ( int samplerTypeName ) { } public void setSamplerTypeName ( String samplerTypeName ) { } public void setSamplerRedirectAutomatically ( boolean b ) { } public void setSamplerFollowRedirects ( boolean b ) { } public void setUseKeepAlive ( boolean b ) { } public void setSamplerDownloadImages ( boolean b ) { } public void setIncludeList ( Collection < String > list ) { } public void setExcludeList ( Collection < String > list ) { } public void setRegexMatch ( boolean b ) { } public void setContentTypeExclude ( String contentTypeExclude ) { } public void setContentTypeInclude ( String contentTypeInclude ) { } public boolean getAssertions ( ) { } public int getGroupingMode ( ) { } public int getPort ( ) { } public String getPortString ( ) { } public int getDefaultPort ( ) { } public boolean getCaptureHttpHeaders ( ) { } public String getSamplerTypeName ( ) { } public boolean getSamplerRedirectAutomatically ( ) { } public boolean getSamplerFollowRedirects ( ) { } public boolean getUseKeepalive ( ) { } public boolean getSamplerDownloadImages ( ) { } public boolean getRegexMatch ( ) { } public String getContentTypeExclude ( ) { } public String getContentTypeInclude ( ) { } public void addConfigElement ( ConfigElement config ) { } public void startProxy ( ) throws IOException { } public void addExcludedPattern ( String pattern ) { } public CollectionProperty getExcludePatterns ( ) { } public void addIncludedPattern ( String pattern ) { } public CollectionProperty getIncludePatterns ( ) { } public void clearExcludedPatterns ( ) { } public void clearIncludedPatterns ( ) { } public JMeterTreeNode getTarget ( ) { } public void setTarget ( JMeterTreeNode target ) { } public synchronized void deliverSampler ( final HTTPSamplerBase sampler , final TestElement [ ] subConfigs , final SampleResult result ) { } public void stopProxy ( ) { } public String [ ] getCertificateDetails ( ) { } boolean filterUrl ( HTTPSamplerBase sampler ) { } boolean filterContentType ( SampleResult result ) { } private final boolean testPattern ( String expression , String sampleContentType , boolean expectedToMatch ) { } private void addAssertion ( JMeterTreeModel model , JMeterTreeNode node ) throws IllegalUserActionException { } private void addDivider ( final JMeterTreeModel model , final JMeterTreeNode node ) { } private void addSimpleController ( final JMeterTreeModel model , final JMeterTreeNode node , String name ) throws InterruptedException , InvocationTargetException { } private void addTransactionController ( final JMeterTreeModel model , final JMeterTreeNode node , String name ) throws InterruptedException , InvocationTargetException { } private void addTimers ( JMeterTreeModel model , JMeterTreeNode node , long deltaT ) { } private JMeterTreeNode findFirstNodeOfType ( Class < ? > type ) { } private JMeterTreeNode findTargetControllerNode ( ) { JMeterTreeNode myTarget = getTarget ( ) ; if ( myTarget != null ) { return myTarget ; } myTarget = findFirstNodeOfType ( RecordingController . class ) ; if ( myTarget != null ) { return myTarget ; } myTarget = findFirstNodeOfType ( AbstractThreadGroup . class ) ; if ( myTarget != null ) { return myTarget ; } myTarget = findFirstNodeOfType ( WorkBench . class ) ; if ( myTarget != null ) { return myTarget ; } <START_BUG> ProxyControl . log . error ( "Program<seq2seq4repair_space>error:<seq2seq4repair_space>proxy<seq2seq4repair_space>recording<seq2seq4repair_space>target<seq2seq4repair_space>not<seq2seq4repair_space>found." ) ; <END_BUG> return null ; } private Collection < ? > findApplicableElements ( JMeterTreeNode myTarget , Class < ? extends TestElement > myClass , boolean ascending ) { } private void placeSampler ( final HTTPSamplerBase sampler , final TestElement [ ] subConfigs , JMeterTreeNode myTarget ) { } private void removeValuesFromSampler ( HTTPSamplerBase sampler , Collection < ConfigTestElement > configurations ) { } private String generateMatchUrl ( HTTPSamplerBase sampler ) { } private boolean matchesPatterns ( String url , CollectionProperty patterns ) { } private void replaceValues ( TestElement sampler , TestElement [ ] configs , Collection < Arguments > variables ) { } private void notifySampleListeners ( SampleEvent event ) { } private void notifyTestListenersOfStart ( ) { } private void notifyTestListenersOfEnd ( ) { } @ Override public boolean canRemove ( ) { } private void initKeyStore ( ) throws IOException , GeneralSecurityException { } private void initUserKeyStore ( ) { } private void initDynamicKeyStore ( ) throws IOException , GeneralSecurityException { } private boolean isValid ( String subject ) { } KeyStore updateKeyStore ( String port , String host ) throws IOException , GeneralSecurityException { } private void initJMeterKeyStore ( ) throws IOException , GeneralSecurityException { } private KeyStore getKeyStore ( char [ ] password ) throws IOException , GeneralSecurityException { } private String getPassword ( ) { } private void setPassword ( String password ) { } KeyStore getKeyStore ( ) { } String getKeyPassword ( ) { } public static boolean isDynamicMode ( ) { } }

Fix:
ProxyControl . log . error ( "Program<seq2seq4repair_space>error:<seq2seq4repair_space>test<seq2seq4repair_space>script<seq2seq4repair_space>recording<seq2seq4repair_space>target<seq2seq4repair_space>not<seq2seq4repair_space>found." ) ;